Figure 3-176. Tamper-proof covers, installed view.

TM 9-2910-226-34

(f) Overflow valve-to-test stand fuel return

hose (D) to the test stand fuel return.

(2) Remove improvised manifold (fig. 3-163 or

3-169) consisting of adapters (J and K), tee (H), and

elbow (G) from the compensator inlet tee (on code G

pumps remove adapter) (C, fig. 3-165), coupling (B)

and elbow (A) from elbow at hydraulic head inlet.

(3) Disconnect and remove the tube assemblies

from the pump head to the test nozzles (fig. 3-169).

(4) Remove throttle holding spring (fig. 3-163).

Install pipe plug in rear of governor housing (A, B,

E, and F pumps).

(5) Loosen the pump and bracket clamp holding

the pump to the rails, and tip the pump assembly to

drain oil and fuel. Remove pump from test stand.

(6) Plug or cap openings in pump to prevent

entry of dirt.

(7) Remove the retaining nut and lockwasher

on the pump shaft, and remove the test stand drive

hub from the pump,

(8) Remove the adapter ring and bracket from

the pump.

(9) Torque tighten high-speed adjustment

screw hex nut and the idle adjustment screw

Figure 3-176. Tamper-proof covers, installed view.

locknut to 50-60 inch-pounds (fig. 3-173).

(10) On code A pumps, install locking wire on

the two socket head screws attaching the electric

fuel shutoff solenoid to the pump.

(11) Install locking wire on the governor end

cover screws and quill shaft access plate screws.

(12) Install seals to prevent unauthorized tam-

pering of pump adjustments as follows. Refer to

figures 3-176 and 3-177.

(a) Upper dust cover. Install new seal, in-

serting the wire through the hole in the head of the

capscrew and through the boss protruding from the

cover. Crimp the seal using sealing pliers.

(b) Closure cover on fuel adjustment. Install

cover over the fuel adjustment guide locknut on the

density compensator housing flange, using the two

drilled head housing mounting screws. Install the

new lead seal by threading the sealing wire through

the front compensator to governor housing screws.

Insert wire through the lead seal and crimp using

sealing pliers.

(c) Compensator servo pressure valve.

Pumps with fuel density compensators should have

Figure 3-177. Installation of seal wire on fuel density

seals in place. If they are not, install sleeve, and

compensator servo-pressure valve sleeve.

thread wire of lead seal as shown in figure 3-177,

and crimp using sealing pliers.

3-109